2008 STREET STOCK RULES:
BODIES
1. Must be 1965 to present American made cars with minimum wheelbase of 100”.
2. No trucks, sport utility vehicles, station wagons, or front wheel drives.
3. All bodies must utilize a full factory stock steel hood, steel roof, and steel trunk lid. All three pieces must be from the same year, make, and model vehicle. Internal support structure may be removed but all factory window channels and drip edges must remain intact on roof panels. Internal support structure only may be removed from hood and trunk lid. Perimeter edges on side of hood may not be removed. Factory front and rear roof pillars must remain stock to top of front fender and top of rear quarter panels.
4. Body sides including front fenders, doors, and rear quarter panels may be fabricated using minimum 22 gauge steel but must retain original factory appearance and body liner. Body sides may not be any lower than original rocker panels. Doors must be welded or bolted shut. All sheet metal must maintain 5 inch ground clearance.
5. Gutting of bodies allowed. All flammable material must be removed along with all glass, chrome, and plastic.
6. All cars must have full stock front firewall, in the original location of chassis being used. Stock floor pan must be maintained to rear of driver’s seat, across entire width of interior. All holes in front and rear firewall, and floor pan, must be covered with minimum 22 gauge steel. Rear firewall MUST be steel.
7. Aftermarket stock appearing rubber nose and tail pieces may be used, but must match body being used. All cars using rubber or plastic nose and/or tail piece, must have (2) steel cables in both the front and rear for towing purposes. Cables MUST be strong enough to support weight of vehicle. Slits may be cut in nose and tail piece, so cables may be tucked in, until needed.
8. Cars must have complete wire screen or lexan windshield, supported inside at center by (3) vertical steel bars, minimum 1 inch by 1/8 inch, not less than 4 inches apart. No part of the front windshield opening or rear window opening may be obstructed. NO rear windshields.
9. Hood scoops allowed up to 4 inch maximum height, measured at any point. Hood scoops may be aftermarket or factory items. Single hood scoop only. Opening may face forward or be located at rear of hood.
10. Maximum 6 inch height, clear lexan spoilers allowed. No lettering on lexan spoilers. No side pieces allowed on lexan spoilers. May use factory OEM spoiler for body being used. Maximum 4 inch tall aluminum or steel spoilers with no side pieces are also permitted. One spoiler only allowed and must attach to rear of trunk lid.
FRAMES and SUSPENSION
1. All cars may replace frame rail from centerline of rear axle, to rear bumper mounts, utilizing 2 x 3 inch box tubing. Coil spring cars must retain original cross member and spring mount location. Uni-body cars must connect front and rear sub frames with minimum 2 x 3 inch box tubing. Uni-body leaf spring cars may replace rear frame rails entirely with 2 x 3 inch box tubing and may connect to rear of original unaltered front sub frame.
2. All cars must retain minimum of 5 inch ride height at all times, with driver buckled in seat.
3. Front spring pockets must remain stock and in stock location.
4. The rear shackle attaching points must be within factory tolerances of stock location.
5. Wheelbase may not be altered in any way.
6. No rod ends allowed on any suspension part, except for shocks.
7. Sway bar links may be fastened any other way, to top of the lower A frames.
8. Front lower control arms, spindles, steering components, and sway bar-must be from make and model of chassis being used. All suspension components must remain stock unaltered.
9. All suspension components (except otherwise noted) must mount in stock location for year, make, and model of chassis being used. Front upper and lower control arm mounting points on frame, may NOT be altered or relocated in any way. Gussets may be added to suspension pieces for strengthening purposes only.
10. Shocks may be mounted in any location. Only steel shocks permitted, one per wheel, with a maximum cost of $100 dollars per shock.
11. Stock type ball joints for year, make, and model of chassis only.
12. Stock type steel springs only although spring rates may be altered. Springs must be in stock location.
13. Aftermarket steel tubular upper control arms are permitted but they must mount to stock frame mounts without modifications. Control arms must bolt directly to factory mounting holes and retain factory type ball joint. No screw in ball joints.
14. Urethane, rubber, or metal suspension bushings, may be used.
15. Rear suspension upper control arm mounting holes, may be moved on frame.
16. Lower control arm mounting holes, may be moved on rear end housing only.
17. One external weight jacking device allowed per wheel.
18. Rear upper and lower control arms must be for year, make, and model of chassis being used.
19. No aluminum suspension components.
ROLL BARS
1. Minimum 1 ½” x .120” or 1 ¾” x .095” round steel seamless (or DOM) tubing recommended.
2. All cars are required to have a rear vertical hoop behind and above the drivers’ head connected to left and right front roll bar legs by a roof hoop.
3. The front roll bar legs must follow the contour of the windshield post and cowl.
4. Maximum distance from the windshield to the rear of roll bar should be no more than 4 inches.
5. A diagonal bar from the top left to the bottom right must support the rear vertical hoop. 6. A roll bar must connect the left and right of the rear vertical hoop at seat height and across the floor pan at the bottom.
7. An additional bar must be installed at dashboard level, extended from the left front roll bar leg to the right front roll bar leg.
8. A minimum of three door bars on the left side and 2 door bars on the right side must be used. Door bars must be convex in shape and extend into the door panels. Door bars must be attached to each other and the frame with vertical bars.
9. Minimum 1/8” x 1 ½” gussets must be welded into all main cage joints and driver’s door bars.
10. Racing seat MANDATORY.
11. Minimum 1” diameter steel tubing welded directly into the cage must support driver’s seat. 3” lap belts and 3” shoulder harnesses are mandatory. Crotch belts are recommended. All belts and harnesses must be securely fastened to the cage (harnesses must be attached below shoulder level).
12. All belts must be dated and no more than 5 years old. All belts must be un-frayed and in good appearance. Roll bars in the drivers’ area must be padded.
13. Headrests and drop-down window nets are mandatory.
14. A radiator hoop may be utilized in front of the cage with a maximum of 2 upright supports.
15. Rear cage supports may extend to the rear of the frame, no uprights allowed. All main hoops must attach to the original frame.
16. Plating of driver side door bars HIGHLY RECOMMENDED.
RUB RAILS/ BUMPERS
1. Rub rails allowed.
2. The top of the rub rail is to be no higher than the top of the tires, and no lower than hub center height.
3. Rub rails must be made of tubing maximum 1 ¾” O.D. and will be 2” maximum to the inside of the rail to body.
4. One single rub rail per side.
5. Ends must not be exposed to the outside of the body skin.
6. Bumpers must be securely safety chained to each frame rail to prevent them from dropping onto the raceway.
7. A flat piece of metal must be welded or bolted from the outside edge of bumper flush to rear quarter panel and front fender if not using rubber nose.
8. Tow hooks required on both frame rails, front and rear.
9. No sharp edges or cut-off ends.
WEIGHTS and PERCENTAGES
1. All coil spring cars must weigh 3000 pounds, with driver-after the race.
2. All leaf spring cars must weigh 3150 pounds, with driver-after the race.
3. Coil spring cars may have a maximum of 57% left side weight. Leaf spring cars may have a maximum of 56% left side weight.
4. Leaf spring cars may have a maximum of 48% rear weight. No rear percentage limit on any coil spring cars.
5. All weights and percentages will be measured with driver buckled in seat.
BRAKES
1. Four wheel stock hydraulic brakes in working order mandatory.
2. No balance bars or adjustable proportioning valves.
3. OEM master cylinders only.
4. No after market master cylinders.
5. No aluminum brake components.
6. May install rear disc brakes utilizing stock parts and an aftermarket bracket.
ENGINE
1. Any overhead valve V-8 American manufactured production engine permitted.
2. Stock stroke and stock bore (+0.60 max.)
3. ENGINE MUST REMAIN IN STOCK LOCATION.
4. Engine must be of same manufacture as car used.
5. Maximum compression ratio of 9.0:1.
6. No porting, polishing, or alterations of any kind permitted.
7. Chevy engines must have a maximum stroke of 3.480 and a maximum bore of 4.060.
8. Maximum displacement of 360 cubic inches (+.030 overbore on Mopar) on all engines. 9. Edelbrock Performer PN# 2101 or 2116 and unaltered Holley R4412, 500 cfm, carburetor mounted on a 1” adapter plate. *Check with tech inspector for part # of intake manifold for different manufactured engines*
10. Mechanical throttle linkage with toe strap and double throttle return springs required.
11. Stock production, cast iron heads (no bow tie or bowtie vortec heads). World Product #4266 and #4267 for Chevy and World Products #5303B for Fords are allowed (part numbers must be visible).
12. Dish or flat top pistons only.
13. Any flat tappet or hydraulic roller camshaft allowed.
14. Stock dimension magnetic flat tappet lifters or hydraulic roller lifters for engine used mandatory. If hydraulic roller lifters are being used, the valve springs may not exceed 1.260 inches in diameter. Retro-fit hydraulic roller lifters are permitted.
15. Roller rockers allowed, no shaft style rockers (unless factory issued) or stud girdles.
16. Stock single point distributor or stock electronic ignition only.
17. No MSD boxes.
18. Stock unaltered standard or automatic transmissions mandatory.
19. Stock type steel flywheel, clutch, and pressure plate ONLY. Minimum weight of flywheel will be 15 pounds. Minimum weight of pressure plate will be 13 pounds. Minimum weight of clutch disc will be 3 pounds.
20. Blow proof steel bell housing mandatory for standard transmissions.
21. Automatic transmissions must use working stock torque converter only. Must be minimum of 12 inches in diameter.
22. All cars must be able to move under their own power, and be self-starting.
23. Street headers allowed.
24. All cars must have 2 Dynomax #24222 mufflers. System must be securely fastened and leak free.
25. One radiator in front of engine only.
26. All cars must carry a securely fastened and leak-proof 1-gallon overflow tank. NO ANTI-FREEZE!
27. GM #602 Crate engine will be permitted with box stock #4412 2 barrel Holley carb. Crate motors are subject to tech inspection, regardless of seals.
REARS
1. Stock rears for year, make, and model.
2. May use Ford 9 inch rear (non-floater).
3. All rears must be locked.
4. Magnetic mini-spool or welded spiders only.
5. No lockers or ratchet type rears allowed.
WHEELS AND TIRES
1. 8” steel racing wheels mandatory.
2. 1-inch steel lug nuts with proper taper are mandatory.
3. Different offsets allowed.
4. ¼” spacers permitted.
5. No lightweight wheels.
6. Track tire only.
GAS TANKS
1. Encased fuel cell (maximum 22 gallons) is mandatory.
2. Fuel cell must be securely fastened to rear frame.
3. Fuel shut off valve must be in plain view and within drivers reach, painted fluorescent red or orange and clearly marked “ON” and “OFF”.
4. Stock mechanical fuel pumps only, no electric fuel pumps.
5. Bottom of fuel cell may not be lower than 10” to the ground with driver.
6. Must have a minimum of a 1-inch by 1 inch X-brace under fuel cell.
BATTERY
1. Battery may be located in the drivers’ compartment and enclosed in a spill-proof container securely fastened to the floor.
2. All batteries must have a spill or splash cover.
3. Battery shut off switch is mandatory. MUST BE IN PLAIN VIEW, painted fluorescent yellow or orange and clearly marked “ON” and “OFF”.
DRIVESHAFT
1. Magnetic steel drive shafts only.
2. Drive shaft should be painted white or yellow for visibility if lost on racetrack.
3. All cars must use a steel retaining hoop at the front and the rear of drive shaft.
GENERAL
1. No rear view mirrors, radios, or any other form of driver/crew communication.
2. Driver MUST monitor one way track scanner and obey and respond to race director’s instructions.